This is a note to let you know that I've just added the patch titled
Btrfs: don't drop path when printing out tree errors in scrub
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-don-t-drop-path-when-printing-out-tree-errors-in-scrub.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d8fe29e9dea8d7d61fd140d8779326856478fc62 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@xxxxxxxxxxxx>
Date: Fri, 29 Mar 2013 08:09:34 -0600
Subject: Btrfs: don't drop path when printing out tree errors in scrub
From: Josef Bacik <jbacik@xxxxxxxxxxxx>
commit d8fe29e9dea8d7d61fd140d8779326856478fc62 upstream.
A user reported a panic where we were panicing somewhere in
tree_backref_for_extent from scrub_print_warning. He only captured the trace
but looking at scrub_print_warning we drop the path right before we mess with
the extent buffer to print out a bunch of stuff, which isn't right. So fix this
by dropping the path after we use the eb if we need to. Thanks,
Signed-off-by: Josef Bacik <jbacik@xxxxxxxxxxxx>
Signed-off-by: Chris Mason <chris.mason@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/scrub.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -383,7 +383,6 @@ static void scrub_print_warning(const ch
eb = path->nodes[0];
ei = btrfs_item_ptr(eb, path->slots[0], struct btrfs_extent_item);
item_size = btrfs_item_size_nr(eb, path->slots[0]);
- btrfs_release_path(path);
if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
do {
@@ -398,7 +397,9 @@ static void scrub_print_warning(const ch
ret < 0 ? -1 : ref_level,
ret < 0 ? -1 : ref_root);
} while (ret != 1);
+ btrfs_release_path(path);
} else {
+ btrfs_release_path(path);
swarn.path = path;
iterate_extent_inodes(fs_info, found_key.objectid,
extent_item_pos, 1,
Patches currently in stable-queue which might be from jbacik@xxxxxxxxxxxx are
queue-3.4/btrfs-limit-the-global-reserve-to-512mb.patch
queue-3.4/btrfs-don-t-drop-path-when-printing-out-tree-errors-in-scrub.patch
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